A portable unit was developed to provide uniform irradiation of the human testes. The device had built-in radiological protection and provided a dosage independent of the subject geometry, uniform to within +or- 5%. Single doses, between 8-600 rad were administered to the testes of human subjects. Observations were made both before and following irradiation. Parameters evaluated included sperm concentration, motility and morphology, seminal fluid volume, plasma and urinary gonadotropin and… CONTINUE READING